this is my communication model:

external image Schramm's%20Model%202.gif

In my openion this model is the most effective one, thats for many reasons:
-beacause the sender can interpret, define, determine the message he want to send.
-also theres a feed back operation, this is very important for a succesful communication between the sender and the reciever, since it allows the reciever to decode the sender's message and if the reciever wants to ask,inquire,add, or disscus any point with the sender ,he can incode the message he want ,then send it to the sender (considerd as a reciever here) who will decoding it again,then he will decoding the message as response and so on.The op​eration will continue like this....
-this tow-way model allows both the sender and the reciever to make a discussion which can lead them to the most effective openion,the most effective idea ,because this model encourage them to compete to give the most convincing openion.
-the coclusion that both of the sender and the reciever will share information, ideas ,itc....,and they will reach to the most effective idea.